| Experimental demonstration of coherent combining with tip/tilt control based on adaptive space-to-fiber laser beam coupling | |
| Li, Feng1,2; Geng, Chao1; Huang, Guan1; Yang, Yan1; Li, Xinyang1; Qiu, Qi2 | |
| Source Publication | IEEE Photonics Journal
 |
| Volume | 9Issue:2Pages:7891900 |
| 2017 | |
| Language | 英语 |
| ISSN | 1943-0655 |
| Indexed By | SCI ; Ei |
| Abstract | A novel approach of tip/tilt control through optimizing laser beam coupling efficiencies from space to polarization-maintaining-fibers with stochastic parallel gradient descent (SPGD) algorithm for coherent beam combining (CBC) applications is proposed and demonstrated experimentally using a seven-element adaptive fiber-optics collimator (AFOC) array for the first time to the best of our knowledge. Compared with the normal target-in-the-loop SPGD method with just a single cost function, the tip/tilt control here is independent of the phase-locking control and parallel for each cell of the AFOC array. Such characteristic gives the AFOC array capacities of real-time correction of fast-changing turbulence induced tip/tilt-type phase errors. Piezoelectric-ceramic-ring fiber-optic phase compensator and AFOC are developed to correct the piston- and tip/tilt-type aberrations, respectively. The power-in-the-bucket (PIB) metric is used for phase-locking. Parallel tip/tilt control is implemented via maximizing the received power in each subaperture with fixed two-channel SPGD control. The average of normalized coupling efficiencies of seven AFOCs increases from 0.76 without tip/tilt control to 0.94 under control. In CBC, the PIB metric increases by 4.6 times, and the phase residual error is less than λ/15. © 2017 IEEE. |
| Keyword | Cost functions - Efficiency - Fiber lasers - Fiber optics - Fibers - Gradient methods - Laser beams - Locks (fasteners) - Piezoelectric ceramics - Polarization-maintaining fiber - Stochastic systems |
| Document Type | 期刊论文 |
| Identifier | http://ir.ioe.ac.cn/handle/181551/8806 |
| Collection | 自适应光学技术研究室（八室） |
| Affiliation | 1.Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; 2.School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu; 610054, China |
| Recommended Citation GB/T 7714 | Li, Feng,Geng, Chao,Huang, Guan,et al. Experimental demonstration of coherent combining with tip/tilt control based on adaptive space-to-fiber laser beam coupling[J]. IEEE Photonics Journal,2017,9(2):7891900. |
| APA | Li, Feng,Geng, Chao,Huang, Guan,Yang, Yan,Li, Xinyang,&Qiu, Qi.(2017).Experimental demonstration of coherent combining with tip/tilt control based on adaptive space-to-fiber laser beam coupling.IEEE Photonics Journal,9(2),7891900. |
| MLA | Li, Feng,et al."Experimental demonstration of coherent combining with tip/tilt control based on adaptive space-to-fiber laser beam coupling".IEEE Photonics Journal 9.2(2017):7891900. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 2017-2046.pdf（1479KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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